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Knightrous
Site Admin
Joined: 15 Jun 2004
Posts: 8511
Location: NSW
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quote:
Originally posted by Daniel:
To all
. Ignore him. He must be grumpy today.
Andrew,
SHUT UP!
OMFG! Post of the Day!
Dumhed & kkeerroo: You guys are starting to name call now. Dumhed, your system wasn't built to the rules, which is pretty stupid, but, with your ability to make things PFG you made a system that was entirely safe. kkeerroo, you followed the rules, you made a system that is very safe and you did a lot of research into it, just drop this argument and move on knowing you have the moral high ground.
This thread has gone far enough, +1 vote for thread lock (Loctite anyway hahahaha ). _________________ https://www.halfdonethings.com/
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Tue Sep 26, 2006 8:39 am |
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DumHed
Experienced Roboteer
Joined: 29 Jun 2004
Posts: 1219
Location: Sydney
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quote:
Originally posted by Ajax:
quote:
I didn't use the SodaStream's relief valve because I had no easy way of connecting a hose to it, and figured that it wouldn't offer any more reliability than the rest of the system.
I agree. But I do believe it is neccassery.
Fair enough.
If I get a chance to get to another robot event I'll add in the sodastream PRD, after some experimentation.
Remember that the PRD will still allow the system to be at ~100psi, which is plenty to cause injury.
It will prevent things like the ram being blown apart, but with a ram rated for operation at 150psi I don't think it's going to blow up before that unless it's been damaged, in which case I'd be just as worried at 100psi as I would be at 200psi.
quote:
Pesonaly I think it should be a normaly open vent used.
Apply power to close the vent.
I actually tried that, but the valves I had wouldn't stay closed under pressure. Even the one in the bot leaks if the pressure gets too high (~100psi or so)
quote:
Improve safety. Try and build systems to be in a safe state when no power is connected.
An open vent would do this.
That's the function of the ram being held open when not in the arena.
The ram exhaust ports are much larger than any available valve.
quote:
Yes but at some time the robot needs to be turned on.
If there is a locking pin in place, it just adds that little bit of extra safety.
I think that getting to the locking pin would pose a bigger safety risk than not having one. What if you turn the valve on while trying to install or remove the locking pin?
All the valve parts were well buried in the robot to prevent damage and accidental operation.
quote:
At the moment if Stealth is fired and never makes it to 75% extention, for instance stuck under rail. fight would stop then kick it to resolve problem.
This has actually happened on several occasions, and it throws itself backwards through the air and clear of the wall
I've never had the ram not make full extension, except when the gas ran out. Basically it either throws what it's trying to throw, or throws itself
quote:
but if there was a manual over ride or timer in place then you have control to reset pneumatics and continue with out stopping the fight.
Since I've never had to stop a fight for those reasons I'm not too worried about it. The system worked even when Jolt ripped the flipper plate off and bent the ram
quote:
Dumhed, your system wasn't built to the rules, which is pretty stupid
I didn't build it to the rules because the rules were based on only one type of system.
Personally, I think it's a bit stupid to put $1000+ worth of fragile parts into a combat robot, but maybe that's just because I can't afford said parts.
I'd be worried about my own safety when turning valves on and moff manually in a robot with pneumatic parts that are re used many times, and may have sustained damage. I like the security of a brand new tested bottle every time, and a system that is only pressurised in the safety of the arena, and even then only for the occasional second. _________________
The Engine Whisperer
- fixer of things
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Tue Sep 26, 2006 10:06 am |
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